Perspective distortion - ray tracing methods , Computer Graphics

Perspective Distortion - Polygon Rendering and Ray Tracing Methods

Anomalies are introduced since interpolation is performed after perspective transformation in the 3-D screen-coordinate system, quite than in the WC system. For illustration, linear interpolation causes the shading information to be incremented through a constant amount from one scan line to the other along each edge. Identify what happens when vertex 1 is more distant than vertex 2. Perspective foreshortening implies that the dissimilarity from one scan line to the other in the untransformed z value along an edge rises in the direction of the farther coordinate. Hence, if ys  = (y1 + y2 ) , then Is = (I1 + I2 ) / 2 , although zs will not equal  (z1 + z2)/ 2 . This issue can also be solved by utilizing a superior number of smaller polygons. Reducing the size of the polygons raises the number of points at that the information to be interpolated is sampled and thus increases the accuracy of the shading.            

1903_Perspective Distortion - Polygon Rendering and Ray Tracing Methods 1.png

Figure: (a)

439_Perspective Distortion - Polygon Rendering and Ray Tracing Methods 2.png

Figure: (b)

In figure 17 (a) and (b) as in above demonstrates Interpolated values derived for point P upon similar polygon at diverse orientations that are different from (a) to (b). P interpolates A, B, D in (a) and A, B, C in (b).

Posted Date: 4/5/2013 3:42:07 AM | Location : United States







Related Discussions:- Perspective distortion - ray tracing methods , Assignment Help, Ask Question on Perspective distortion - ray tracing methods , Get Answer, Expert's Help, Perspective distortion - ray tracing methods Discussions

Write discussion on Perspective distortion - ray tracing methods
Your posts are moderated
Related Questions
why there is coating of phosphorous on CRT screen?

Remember in polygonalization of the surface, following rules must be followed. Any two polygons  (i)  share a common edge,   (ii)  Share a common vertext,  (iii)  Arc disj

QUESTION (a) Describe the following Mean Filters used as Noise Reduction filters: 1. Arithmetic Mean Filter. 2. Geometric Mean Filer. 3. Harmonic Mean Filter. You a

Transformation for 3-D Shearing 2-dimensional xy-shearing transformation, as explained in equation, can also be simply extended to 3-dimensional case. All coordinates are tran

Q. Explain about Unified Memory Architecture? UMA signifies Unified Memory Architecture. It is an architecture that reduces the cost of PC construction.  In this a part of main

QUESTION A trainee designer, Susan, joins your place of work. During a workshop, you are asked to present on printing procedures and agencies in Mauritius. Susan asks you what

What are the features found in CAD Features generally found in a CAD package involve: - 2D and 3D modelling - Wire frame - Library of parts that can be used in new dra

Audio File Formats: It is a container format for storing audio data in a computer system. Many file formats are there for storing audio files. The common approach towards

Sketch Line Segment That Joining By Using Bresenham Line Algorithm Example: Sketch line segment that joining (20, 10) and (25, 14) by using Bresenham line generation algorit

B-spline curves - clipping and 3d primitives B-spline curves are piecewise polynomial cubes with one or more polynomial pieces with a minimum smoothness requirement.  For examp